L-Glutamine Powder, 1 lb, NOW FoodsNOW Foods L Glutamine Powder Free Form. Vegetarian Supplement. Glutamine has recently been the focus of much scientific interest. A growing body of evidence suggests that during certain stressful times, the body may require more glutamine than it can produce. Under these circumstances glutamine may be considered a "conditionally essential" amino acid. Glutamine is involved in maintaining a positive nitrogen balance (an anabolic state) and also aids